<!DOCTYPE html>
<!-- Any copyright is dedicated to the Public Domain.
   - http://creativecommons.org/publicdomain/zero/1.0/ -->

<html>
  <style>
  div#details {
    display: inline-block;
  }
  </style>
  <body>
    Details element:
    <div id="details">
      <div>Summary</div>
      <p>This is the details.</p>
    </div>
  </body>
</html>
